Answer all questions

84PROGRAM SOLAR 2010

MODULE 14 : WATER

SECTION A

1Which of the following explains about water?

IWater is a colourless liquid.

IIAt 00C, pure water freezes into ice.

IIIWater is a good conductor for heat.

AI and II only

BI and III only

CII and III only

DI, II and III

2 Figure 1 shows an experiment conducted to study a physical characteristic of water.

Figure 1

After a few minutes, water at the top of the test tube boils, whereas the ice at the bottom does not melt. This shows that

Aice is denser than water.

Bice is a good conductor of heat.

Cwater is a poor conductor of heat.

Dwater is a good conductor of heat.

3A fish monger adds salt to the ice used to preserve his fish and shellfish. The function of salt is

Ato lower the melting point of ice.

Bto increase the melting point of ice.

Cto increase the freezing point of ice.

Dto kill the microorganisms in the fish.

4Which of the following takes place when water is boiled?

ISize of the water molecules increases.

IIDistance between the water molecules is far apart.

IIIThe kinetic energy of the water molecules increases.

AI and II only

BI and III only

CII and III only

DI, II and III

5What happens to the freezing point and boiling point of water when salt is dissolved in it?

Freezing pointBoiling point

AHigherLower

BLowerHigher

CHigherHigher

DRemains the sameHigher

6Which of the following can be carried out to analyse the composition of water?

AFiltration

BDiffusion

CDistillation

DElectrolysis

7Figure 2 shows the set-up of apparatus in water electrolysis.

Figure 2

Which of the following is true about the experiment?

AGas Q relights a glowing splint.

BGas P causes limewater to turn milky.

CThe volume of gas P collected is twice of the volume of gas Q.

DGas Q gives a pop sound when tested with a lighted splint.

8Figure 3 shows an investigation on the evaporation of water.

Figure 3

After a while, the water in the glass dish B dried up more faster than the water in the glass dish A. What can we conclude from this observation?

AEvaporation does not occur in dark places.

BThe rate of evaporation reduces as the temperature gets higher.

CThe rate of evaporation is not affected by the temperature of the surrounding.

DThe rate of evaporation increases when the temperature of the surrounding is higher.

9A wet cloth can dry faster by the following ways except

Idrying it in a windy area.

IIdrying it in a humid area.

IIIdrying it under the sunlight.

AI and II only

BI and III only

CII and III only

DI, II and III

1015 ml of water is filled in each container shown below and all of them are left under the sunlight for a while. In which container will water dry up first?

11Saturated solution is a solution which

Acontains lots of solute.

Buses water as a solvent.

Ccontains the minimum amount of solute.

Dcontains the maximum amount of solute which can dissolve in a fixed

amount of solvent at a particular temperature.

12Ahmad wanted to investigate the factors that affect solubility. He tried dissolving different substances in 50 cm3 of water at room temperature. What was the variable he was investigating in his experiment?

AThe mass of the solute

BThe nature of the solute

CThe nature of the solvent

DThe concentration of the solute

13Abdullah found out that at room temperature, a maximum amount of 15 g of sugar can be dissolved in 100 cm3 of water. To further increase the amount of sugar that can be dissolved, he could

Aadd more solute

Bcool the solution

Cheat the solution

Dtransfer the solution to a container with a bigger surface

14One of the lab assistance burns on his skin when he accidentally spilled a strong corrosive liquid onto himself. What could this liquid be?

ALime water

BSesame oil

CSalt solution

DSulphuric acid

15A common test to distinguish between an acid and alkali is the

Alitmus test

Blimewater test

CColouration test

Dburning splinter test

16Alkalis can be used for the following purposes except in

Imaking soaps.

IImaking explosives.

IIImanufacturing salts.

AI and II only

BI and III only

CII and III only

DI, II and III

17Which of the following natural sources of water is the most cleanest?

ARainwater

BWell water

CRiver water

DPond water

18Water from natural sources which passes through a sand filter is free from

Abad smells.

Bmicroorganisms.

Cdissolved minerals.

Dinsoluble impurities.

19The following methods can be used to purify water in a water purification site

Ifiltration

IIdistillation

IIIchlorination

AI and II only

BI and III only

CII and III only

DI, II and III

20Distillation is used to obtain

Aa pure liquid from a solution.

Ba soluble solid from a solution.

Ccoloured components in a dye.

Dan soluble solid from a solution.

SECTION B

1.

Figure 1

Figure 1 shows the set-up of the filtration muddy water.

(a)Does the muddy water look cleaner after passing through the filtration? Explain why is this so.

(2 marks)

(b)Can filtration remove large insoluble particles?

(1 mark)

(c)How can you determine that the filtration is free from large insoluble particles?

(2 marks)

(d)Name two substances in muddy water that can pass through filtration.

(2 marks)

2Figure 4

Figure 4 shows an experiment conducted to determine the freezing point and the boiling point of water.

(a)Why is salt added to the ice cubes in A?

(1 mark)

(b)What is the function of the glass tube in B?

(1 mark)(c)State the temperature when water begins to freeze in A.

(1 mark)(d)State the temperature when water begins to boil in B.

(1 mark)(e)What is the change in the state of matter when water

(i) freezes?.......................................................................................................

(ii)boils?...........................................................................................................

(2 marks)(f)What happens to the motion of water molecules when water

(i)freezes?.......................................................................................................

(ii)boils?...........................................................................................................

(2 marks)A

B

A

B

C

D

JABATAN PELAJARAN NEGERI PERAK